Definition of space velocity
1 : the velocity of a star's motion relative to the sun as determined from its proper motion, distance, and radial velocity —called also space motion
2 : the number of volumes of gas or liquid usually calculated to standard conditions that pass over or through one unit volume (as of a catalyst in a reaction tube) in unit time
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up space velocity? Please tell us where you read or heard it (including the quote, if possible).